A former National Australia Bank employee has faced a Melbourne court charged with falsifying dozens of home loan contracts, allegedly resulting in him illegally pocketing more than $800,000.

Andrew Matthews fronted the Melbourne Magistrates Court for a brief hearing a week after NAB revealed it had sacked 20 bankers and disciplined another 32 over the sale of mortgages without accurate customer information and documentation.

The 36-year-old, who was named NAB's mobile banker of the year for regional Victoria in 2015, worked at the Seaford branch, in Melbourne's south-east, until he was sacked in July last year when the alleged scam was uncovered.

The ABC understands Mr Matthews is accused of getting dozens of customers to sign a document wrongly claiming they had been referred to NAB through the bank's Introducer Program, between 2012 and 2016.

The program rewards people who do not work for the bank for referring new customers.

Mr Matthews is accused of conspiring with another man to split the commissions.

He faces 49 counts of obtaining property by deception, one charge of attempting to obtain property by deception, one of conspiring to defraud and three counts of possessing proceeds of crime including a Ferrari and cash totalling $825,176.

In a statement, NAB said it identified the alleged scam through its internal checks and review processes and immediately reported Mr Matthews to police.

It said Mr Matthews was not one of the 20 bankers it last week announced had been sacked.

But it is understood those loans were also organised through the bank's own staff and its Introducer Program.

Mr Matthews is on bail and will return to the Melbourne Magistrates' Court in February for a committal mention.